 |
forums.ps2dev.org
Homebrew PS2, PSP & PS3 Development Discussions
|
| View previous topic :: View next topic |
| Author |
Message |
mattruby
Joined: 13 Jan 2008
Posts: 13
|
 Posted: Mon Jan 28, 2008 3:06 am Post subject: |
 |
|
| episch wrote: | | Is there anything in the hardware stopping someone from say, desoldering the RAM (hot air?) and then using the toaster oven reflow method to put larger capacity chips on there? |
In the 1980s, we used to expand Apple ][+ RAM (and some other 6502 PCs) by just piggybacking extra RAM chips right onto the same leads as the ones soldered to the motherboard.
The largest XDR chips right now (2008-1-27) are still 512Mb. PS3 has 256MB XDR, in 4 512Mb chips. But if >512Mb XDR chips are available, does the PS3 have the address lines to use them?
I could speculate that since they're soldered, Sony also cheaped out on fewer address lines, but maybe their compressed design/manfuacturing handoff schedule actually has the extra lines in the current generation, but just not used until later generations, when bigger XDR is available, and other costs are lower (or profits are higher) so Sony can pay for socketing the XDR. Anyone actually know? |
|
| Back to top |
|
 |
jimparis
Joined: 10 Jun 2005
Posts: 1179
Location: Boston
|
| Posted: Mon Jan 28, 2008 3:32 pm Post subject: |
|
|
| You can't piggyback BGA chips, so unfortunately that trick won't work very easily.. Plus, DRAM (and particularly XDR) is more complicated than SRAM, it's not just a simple "write an address and read the data". |
|
| Back to top |
|
|
mattruby
Joined: 13 Jan 2008
Posts: 13
|
| Posted: Mon Jan 28, 2008 3:56 pm Post subject: |
|
|
| jimparis wrote: | | You can't piggyback BGA chips, so unfortunately that trick won't work very easily.. Plus, DRAM (and particularly XDR) is more complicated than SRAM, it's not just a simple "write an address and read the data". |
Is the PS3 XDR controller chip able to address more than the 4 chips soldered to it? If it is, is there a way to add more chips to the controller? |
|
| Back to top |
|
|
Jim
Joined: 02 Jul 2005
Posts: 487
Location: Sydney
|
| Posted: Mon Jan 28, 2008 10:13 pm Post subject: |
|
|
You really are barking up the wrong tree without a paddle.
Jim
_________________
http://www.dbfinteractive.com |
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
